Sir Francis Bacon on Doubts, Patience, and Certainties

Another error is, an impatience of doubting and a blind hurry of asserting without a mature suspension of judgment. For the two ways of contemplation are like the two ways of action so frequently mentioned by the ancients; the one plain and easy at first, but in the end impassable; the other rough and fatiguing in the entrance, but soon after fair and even: so in contemplation, if we begin with certainties, we shall end in doubts; but if we begin with doubts, and are patient in them, we shall end in certainties. (FROM: ON THE DIGNITY AND ADVANCEMENT OF LEARNING, FIRST BOOK)